IMO, that will never change. Or at least not while they use MTK. I get that none of the current major SoC maker is not interested in linux as 1st class citizen but still, there are lousy ones and the terrible ones and MTK is at the bottom of them all.
Qualcomm is probably the best choice but we can see how that goes with sailfish, a year and a half after the announcement and with the device from SONY open program there are still HW related issues that don't exist on android part of the story.